Sifting attachment for grates.



No. 769,950. PATENTED SEPT. 13, 1904.

J. G. & J. B. LAMOTTE. SIFTING ATTACHMENT FOR GRATBS.

APPLICATION FILED FEB. 27, 1904.

N0 MODEL.

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PATENT i JOSEPH Gr. LAMOTTE AND JOHN B. LAMOTTE, OF WORCESTERMASSACHUSETTS.

SIFTING ATTACHMENT FOR eRATEs.

SPECIFICATION forming part of Letters Patent N0. 769,950, datedSeptember 13, 1904.

Application filed February 27, 190%. Serial No. 195,512. (No model.)

To all whom, it may concern:

Be it known that we, J OSEPH G. LAMOTTE and J OHN B. LAMOTTE, citizensof the United States, residing at Worcester, in the county of Worcesterand State of Massachusetts,have invented a new and useful SiftingAttachment for Grates, of which the following is a specification.

This invention relates to an attachment for use in connection with thegrates of stoves or other fire-pots.

The especial object of this invention is to combine a rotary shaking ordumping mechanism of a grate with a reciprocating screen for sifting theashes.

To these ends this invention consists of the sifting attachmentforgrates and of the combinations of parts therewith, as hereinafterdescribed, and more particularly pointed out in the claims at the end ofthis specification.

In the accompanying drawings, Figure 1 is a sectional view of sufficientparts of a stove to illustrate the application of our invention thereto,and Fig. 2 is an enlarged detail view showing the operative connectionsbetween the rotary shaking or dumping mechanism of a grate and avibrating screen.

In connection with the grate of a stoveor other fire-pot of that typeemploying a rotary handle for shaking or dumping we have provided aninclined sifting-screen which will be vibrated back and forth to shiftthe ashes when ever the grate is operated.

Referring to the accompanying drawingsand in detail, the body portion ofthe stove, as herein illustrated, incloses an oven A and a fire-pot P,which may be lined with fire-brick in the ordinary way.

.- bearings to permit the screen to be vibrated or moved back and forth.

Fastened upon the operative shaft 11 of the grate-bars is a beveled gear17, which meshes with a beveled pinion 18 on the upper end of a verticalshaft 19. The vertical shaft 19 is provided with a bent or crankedsection confor its grate as thus constructed the ashes or other materialwhich passes through the grate when the fire is shaken or dumped willfall upon the inclined screen 15, and the ashes which pass through thescreen will fall into the ash tray or box 21, while the coal and coarsermaterials will be directed down the inclined surface of the screen andwill fall into the coal tray or box 22. By means of this constructionthe ashes will be efficiently sifted and separated from the coal orother coarser materials.

We are aware that numerous changes may be made in applying our inventionto different types of stoves by those who are skilled in the art andthat different forms of grate-bars may be used in connection with oursifting attachment. We do not wish, therefore, to be lim-v ited to thespecial constructionv we have herein shown and described; but

What we do claim, and desire to secure by Letters Patent of the UnitedStates, is-

1. The combination of a fire-grate comprising a plurality of grate-bars,each consisting of a pivoted shaft having extending arms, and asifting-screen having a rectilinearly-recipro cating motion impartedthereto from the turning of the grate-bar shafts.

2. The combination of a fire-grate consisting of a plurality of pivotedshafts geared to turn together, each of said shafts having extendingarms, means for turning the shafts,

an ash-receptacle below the sifting-screen, a receptacle for receivingthe coal deflected by the inclined screen, a crank-shaft connected tomove the screen and beveled gears connecting thecrank-shaft andgrate-operating shaft.

In testimony whereof we have hereunto set our hands in the presence oftwo subscribing witnesses.

JOSEPH G. LAMOTTE. JOHN B. LAMOTTE. Witnesses:

PHILIP W. SOUTHGATE, J. ELMER HALL.

